Wards



(No Model.) 3 Sheets-Sheet 1.

R. J. & A. EDWARDS. MACHINERY 0R APPARATUS FOR GRINDING 0R POLISHING.

No. 465,170. Patented Dec. 15, 1891.

\z n il:

KHCJZM-OL 3 Sheets-Sheet 2.

(No Model.)

B. J, & A. EDWARDS. MACHINERY 0R APPARATUS FOR GRINDING 0R POLISHING.

No. 465,170. Patented Dec. 15, 1891.

(No Model.) sweets-sheet 3.

R. J. a; A. EDWARDS.

' MACHINERY OR APPARATUS FOR GRINDING 0R POLISHING.

Patented Dqc. 15,1891.

' UNITED STATES :PATENT OFF CE.

RICHARD JOHN EDlVARDS AND ARCHER EDWVARDS, OF LONDON, ENGLAND.

MACHINERY oR APPARATUSVFOR GRINDING 0 POLISHING.

srncrrroerron forming part of Letters Patent No. 465,170, dated December15,1891.

Application filed February 18, 1891. Serial No. 381,881. (No model.)Patented in England January 29, 1885, No. 1,292, and in France November17, 1885,11'0. 172,319. g

To all whom it may concern:

Be it known that we, RICHARD JOHN ED- W'ARDS and ARCHER EDWARDS, bothsubjects of the Queen of Great Britain, residing at London, in thecountyof Middlesex, England, have jointly invented a certain new and usefulImprovement in Machinery orApparatus for Grinding and Polishing, (forwhich We have received Letters Patent in England, No. 1,292, datedJanuary 29, 1885, and in France, No. 172,319, dated November 17, 1885,)of which the following is a specification.

Our present invention relates to machinery or apparatus for grinding andpolishing the surface of bars or tubes more or less cylindrical intransverse section and of any length of metal or other material; and ithas for its objects to provide for the grinding and polishing of tubesor bars at asingle continuous operation, to prevent the escape of dustand the wear of the moving parts, to cause the tubes or bars to turnupontheir axes and at stretched while in use. YVe attain these ohects bythe mechanism illustrated in the accompanying drawings, in which- Figure1 is a longitudinal section through the machine; Fig. 2, a top View ofthe machine; Fig. 3, a horizontal section. Fig. 4 is a vertical sectionof an end of a tube and a portion of the trough, showing our method ofpreventing the escape of polishing-dust. Fig. 5 represents an end viewof the same tube and dust-tight attachment. Fig. 6 represents a sectionthrough the axes of' the pulleys of the polishing-belt. Fig. 7represents a side View of the bar and spring-pressure attachment. Fig. 8represents a section across a bar being polished, and shows ourdevicefor holding the bars inposition, adjusting the pressure thereon, andregulating the motion thereof. Fig.9 represents a side view of one ofthe an gularly-disposed disks and its mounti'ngs, Fig. 10 rep'resentsaplan view of the j the pulleys y, (shown upon a larger scale at same.Fig. 11 represents a side view of the adjustable pulley forthepolishing-bands, and

its length, the bands A being supported byv end pulleys or drums y y, aswell as by intermediate ones 11 Thepulleys y y, by which the bands A aredriven, arevcarried and rotate upon spindles supported in bearings C,bolted to the trough B, and they are provided with pulleys driven bybelts z from driving-p111 leys upon the driving-shaft D below, which isitself driven by the fast and loose pulleys E by steam or other power.The trough Bis divided by longitudinal partitions H H into separatecompartments, in some of which the;

belts A run, while in the others the driving apparatus and the mechanismfor turningthe tubes or bars'upon their axes and feeding them forwardwhile being ground and polished are placed. The several compartments arekept entirely separate from each other,

bythe means hereinafter described, so that no dust, or particles of theemery, or other abrasive material used can pass from one to another, andthe bearings and other parts liable to wear are thus'kept frominjury.Each of the pulleys g, which carry the outer ends of the bands A A, iscarried upon a lever I,

turning upon a center K and provided with a weight L, passing round apulley, by which the moving bands are kept properly stretched. g arepulleys which support the bands A at the middle of'their length. Each ofthe pulleys y y 11 which drive and support the belt A, is carried uponthe end of itsspindle and revolve in compartments in which the grind-.ing and polishing processes take place, the spindles of the pulleysy 3passing throughholes in the partition H H, with the intervendust isprevented from passing.

. The spindles upon the levels I, which carry 'tion of disks or piecesof soft felt by which ICO ing the bearings upon which the pulleys re-'volve from dust and wear by means of disks or washers of felt. Thespindle 12, upon which the pulleys y revolve, is made tubular, and u 5is a ring of felt pressed into a recess in the side of the pulley andheld by the plate or. The pulleys are lubricated through the hollowspindle 2;, which is perforated inside the pulley at 'v, and the outerend of the spindle is closed by a screw w, having a head which keeps thepulley in its place, the thread of the screw being made in the samedirection as the pulley revolves.

The tubes or bars (1 d to be ground and polished pass through holes inthe sides of the trough B, the holes being kept dust-tight in a somewhatsimilar way by means of felt, as illustrated in Figs. 4 and 5, in whichd is a tube passing through a hole 0 in the side of the trough B, apiece of felt P being fitted round the tube d and held in position in achamber or recess Q. The felt P is cut at B, so that it can readily befitted over the tube.

The tube or bar (1 or d is supported upon trestles or supports andpushed forward until its end is caught by the feeding and turningdevice, which is illustrated at Figs. 8, 9, and 10. This consists of aroller f, covered with india-rubber or other suitable material and fixedupon a spindle which revolves in the fork f, upon the lower end of whichis formed a spindle. g, which turns in a vertical guide or standard h,fixed directly below the tube or bard, so that the latter is supportedupon the roller f. The spindleor axis of the roller. is provided with apulley 2' for a cord or band 70, which is driven by a driving-pulleyupon a shaft Z below, Figs. 1 and 3, which is itself set in revolutionat the proper speed by pulleys mm and a strap 71. from the driving-shaftD, Figs. 1 and 3.

In Figs. 1, 2, and 3 two tubesdd' of difierent sizes are being groundand polished, the samebands A A A A A A acting upon both of them, andthese supporting and feeding rollers fare shown under each tube, asshown in Fig. 3, one being arranged at the center and one outside eachside of the trough B. The two shafts l are connected by a belt 0,passing round pulleys o 0 Figs. 1 and 3, upon the shafts, so that all,the rollers f are driven at the required speed. If the tubes 01 d beheld down upon the rollers f, when the latter are revolving, the tubesare also made to revolve upon their axes, and if at the same time therollers f are made to take a position somewhat inclined across thetubes, as shown in Figs. 3, 8, 9, and 10, the latter are made to travelforward as well as to revolve, the speed of their forward movementdepending upon the angle of the rollers f. In order to adjust and holdthe rollers at any desired angle, the lower ends of the spindles g havefitted upon them levers p, to the outer ends of which is jointed a rod0", the end of which is provided with a screw and wheel S, Fig. 3, bywhich the exact position of the levers p and the an gle ot'the pulleys fcan be simultaneously altered and adjusted.

In order to hold down the tubes or bars at (1' upon the pulleys f, wearrange across the trough B, above each tube or bar, a transverse beamor frame e, Figs. 1 and 2, pivoted upon arms I) to the sides of the.trough B, so that it can be turned up out of-the way when desired. Thesebeams eare shown upon alarger scale in Figs. 6 and 7, and upon the Upperside s they have formed upon them vertical guides or sockets b b b, inwhich fit spindles c, the lower ends of which carry the guidingcarriagesT T T. Each of these carriages has fitted and fixed upon its lower sidetwo parallel tubes U U,in which tnrnfreely spindles having fixed upontheir ends wheels or rollers V V, covered with india-rubber, which pressupon and hold down the tubes or bars-d d. The spindle c has at its upperend an adjustable. cross-bar W, to which springs X X are attached, bywhich the spindle c and the rollers V are pressed down with any desiredforce upon the tubes or barsd (1, directly above the pulleys f.

The parts of the trough B below the bands A A A are closed by horizontalpartitions Bf. These horizontal partitions form the floors and thepartitions H the side walls of a number of separate closed compartments,and

these separate closed compartments in which the bands move are suppliedwith emery or other abrasive powder of dilferent degrees of fineness,the coarsest being supplied to the compartment which the tube or barfirst enters and the finest to that which it passes through last, andthe several compartments are closed by covers Z, which can be readilyremoved and replaced when desired, but when in position entirely closethetrough B, so that no dust can escape.

Two machines may be placed side by side, the tubes or bars (1 d passingfrom oneto the other.

The operation of the machine is as follows: The driving-shaft D beingset in revolution, driven by the belts z, the pulleys y, which carry theendless bands A, are thus kept in rapid.

movement, and are kept stretched and in proper position by theweighted-pulleys y at the other end, and the central pulleys g theirsurfaces being kept supplied with suitable grinding and polishingpowders. The,

tubes at and d are introduced through holes in the sides of the troughB, made dust-tight by felt packing P, and are supported and fed forwardby the inclined rollers f, while they are held down by .the rollers V,carried by the hinged cross-frames e, and pressed down by the springs X.The rollers f are set and held at the proper angle by the levers p, rods1, and adjusting-wheels s, and are made to revolve at the proper speedto turn and feed forward the tubes or bars (1 d by the pulleys and beltsm, m, n, 0, 0', 0 t', and k. It will be seen that the machine isentirely closed in and that the parts in which the grinding andpolishing take place are completely separated from the parts in whichthe bearings and other parts liable to wear are situated, so that themachine is Very durable and requires little attention or repair.

When necessary, the covers Z can be removed and the cross-beams 6 turnedupon their hinged arms I), and easy access can then be had to theinterior to change the bands A, or for other purposes.

As the pulleys which carry the bands A have no bearings or otherobstructions on their outer side, the bands can be very easily removedand changed. 1 I

In the figures two tubes d d are shown; but it is evident that any othernumber maybe simultaneously operated upon by increasing the number ofcross-beams e,with their springrollers, and of the inclined supportingand feeding rollers f below. v

The bands A may consist of strips of emerycloth or other abrasivematerial of varying fineness, or of plain bands of cloth or other 1material to which the abrasive powder is kept supplied.

What we claim, and desire to secure by Letters Patent, is-

1. The combination, in a machine for grinding and polishing tubes andbars, of the trough B, partitions H, pulleys. y y fixed bearings O,abrasive bands A, and Weighted levers I, substantially as set forth.

2. The combination,with the abrasive bands A, of the adjustable inclinedturning and feeding rollers f, the transverse beams e, pressure-wheelsV, and springs X, substantially as set forth.

3. The spindle U, carriages T, tubes U, pressure-wheels V, standard b,movable crossbar W, and springs X, substantially as and for the purposeset forth.

4. The spindle g, fork f, adj ustableroller f, pulley '5, lever 19, rodr, and adj Listing-wheel while being polished, the combination, with Ythe tube or bar, of a rotating shaft, a disk set angularly thereon forturning the tube or bar and moving it in the line of said shaft, aspring-plunger mounted over said disk, a plurality of anti-frictionrollers at the base of said plunger and attached thereto for engagingsaid tube or bar, and a pivoted arm for bearing down said spring-plungerand adj usting the pressure on said bar, substantially as described.

7. In a device for holding tubes or bars ity of disks set at an anglethereon for turning the tube or bar about its axis and moving it in thedirection of said shaft, a plurality of spring-plungersmounted over saidtube or.

bar and adjusting the pressure thereon and e on said rotating disks, atransverse beam con- .nectedto the springs of all of saidspring-plunwhile being polished, the combination, with I the tube orbar, of a rotating shaft, a pluralgers, a plurality of arms connected tosaid beams, and a rock-shaft actuating said arms and so adjusting thepressure of said tube or bar on said angularly-placed' disks,substantially as described.

8. In a device for polishing tubes or bars, the combination, with thetube or bar, of a trough for holding the, polishing material, saidtrough having holes in the side thereof loosely inclosing said tube orbar, a felt.

washer fitting snugly against said tube or bar, and a following plate orboard holding said felt washer in position, substantially as described.

9.- The combination of the pulley 1 hollow spindle '0, havingperforations 12', felt disk to,

screw w, and plates 00 and z, substantiallyas set forth, and shown inFig. 13.

In testimony whereof We have hereunto set our hands in the presence oftwo witnesses.

RICHARD JOHN EDWARDS. ARoHER EDWARDS.

Witnesses: A

JANE G. A. RIDGWAY, ARTHUR ERNEST EDWARDS.

